CN108414785A - Sensor and detection device - Google Patents
Sensor and detection device Download PDFInfo
- Publication number
- CN108414785A CN108414785A CN201810417142.6A CN201810417142A CN108414785A CN 108414785 A CN108414785 A CN 108414785A CN 201810417142 A CN201810417142 A CN 201810417142A CN 108414785 A CN108414785 A CN 108414785A
- Authority
- CN
- China
- Prior art keywords
- magnet
- assembly
- square
- circuit board
- target object
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 239000004033 plastic Substances 0.000 claims description 10
- 229920003023 plastic Polymers 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
Abstract
The present invention provides sensors and detection device, are related to commercial Application technical field, including assembly circuit board, magnet assembly and the shell for fixation assembly circuit board and magnet assembly；Shell is set on target object, so that target object drives magnet assembly to be rotated；Magnet assembly is used to provide triggering magnetic field for assembly circuit board；Assembly circuit board is used to export square-wave signal according to triggering magnetic field, and square-wave signal is sent to controller, so that controller passes through square-wave signal, the direction of rotation of detected target object and speed, the application provides small volume, lower-cost sensor comes while measuring rotating object direction and speed.
Description
Technical field
The present invention relates to commercial Application technical fields, more particularly, to sensor and detection device.
Background technology
It is common at present to integrate a Hall speed band direction chip or simultaneously two Hall switch chips according to testing principle
Hall sensor come while measuring speed and the direction of rotating object.
At the same time, above two scheme matched more respectively magnetic encoder or ferromagnetism signal wheels.The former by
Then injecting magnetic, therefore mold and unit price are higher, and magnetism-charging mould design is complicated.Secondly as design has been shaped, shortcoming changes
Become the flexibility that number of magnetic poles is suitable for different demands；The latter's signal wheel volume is larger, while needing to install or collect behind in chip
At magnet, system cost also rises therewith.
Invention content
In view of this, the purpose of the present invention is to provide sensor and detection device, small volume, lower-cost is provided
Sensor comes while measuring rotating object direction and speed.
In a first aspect, an embodiment of the present invention provides sensor, including assembly circuit board, magnet assembly and for fixing
State the shell of assembly circuit board and magnet assembly；
The shell is set on target object, so that the target object drives the magnet assembly to be rotated；
The magnet assembly is used to provide triggering magnetic field for the assembly circuit board；
The assembly circuit board is used to export square-wave signal according to the triggering magnetic field, and the square-wave signal is sent to
Controller, so that the controller detects direction of rotation and the speed of the target object by the square-wave signal.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiments of first aspect, wherein institute
It includes multiple magnet and the magnet plastic shell for fixing multiple magnet to state magnet assembly, wherein the magnet plastics
Shell is by the magnet equidistant interval.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiments of first aspect, wherein institute
The different triggering magnetic fields that assembly circuit board is generated according to the magnet assembly are stated, the different square-wave signals is exported,
Wherein, the magnet assembly of different magnet numbers generates the different triggering magnetic field, the different rotation of the target object
Speed, direction generate the different triggering magnetic field.
With reference to first aspect, an embodiment of the present invention provides the third possible embodiments of first aspect, wherein institute
The triggering magnetic field that magnet assembly is generated by reducing magnet number is stated, increases the assembly circuit board in the target object
The duty ratio of the square-wave signal exported when rotating forward is accounted for the square-wave signal that is exported when the target object inverts
Difference between sky ratio.
With reference to first aspect, an embodiment of the present invention provides the 4th kind of possible embodiments of first aspect, wherein institute
It includes magnetic switch chip, capacitance C, resistance R1, Light-emitting diode LED and load resistance R2 to state assembly circuit board；
The input terminal of the magnetic switch chip is connected with one end of power supply VCC and the capacitance C respectively, the capacitance
The other end of C is grounded, the output end of magnetic switch chip one end with the resistance R1 and the load resistance R2 respectively
It is connected；The other end of the resistance R1 is connected with the anode of the Light-emitting diode LED, the Light-emitting diode LED
Cathode is grounded, the other end ground connection of the load resistance R2, ground terminal and the light emitting diode of the magnetic switch chip
The cathode of LED is connected.
With reference to first aspect, an embodiment of the present invention provides the 5th kind of possible embodiments of first aspect, wherein institute
It is to be detachably connected that magnet assembly, which is stated, with the shell, can carry out the magnet assembly of different magnet numbers and the shell
Dismounting assembling.
With reference to first aspect, an embodiment of the present invention provides the 6th kind of possible embodiments of first aspect, wherein also
Including harness and seal assembly；
The harness is connected with the assembly circuit board, for providing electric energy for the assembly circuit board, and will be described
Square-wave signal is sent to the controller；
The seal assembly is separately positioned on the harness and the shell link position and the shell and the target
Object link position is used for dustproof and waterproof.
With reference to first aspect, an embodiment of the present invention provides the 7th kind of possible embodiments of first aspect, wherein logical
It crosses buckle the inner ring of the magnet assembly and the shell is fixed and is limited axially.
Second aspect, the embodiment of the present invention also provide detection device, including sensor as described above, further include with it is described
The controller that sensor is connected, the square-wave signal sent for receiving the sensor, and the square-wave signal is divided
Analysis, knows direction of rotation and the speed of target object.
In conjunction with second aspect, an embodiment of the present invention provides the first possible embodiments of second aspect, wherein institute
It states controller and knows the direction of rotation of the target object according to the duty ratio of the square-wave signal and believed by the square wave
Predetermined level number number in preset time knows the speed of the target object.
An embodiment of the present invention provides sensor and detection device, including assembly circuit board, magnet assembly and for fixing
The shell of assembly circuit board and magnet assembly；Shell is set on target object, so that target object drives magnet assembly to carry out
Rotation；Magnet assembly is used to provide triggering magnetic field for assembly circuit board；Assembly circuit board is used to export square wave according to triggering magnetic field
Signal, and square-wave signal is sent to controller so that controller is by square-wave signal, the direction of rotation of detected target object and
Speed, the application provides small volume, lower-cost sensor comes while measuring rotating object direction and speed.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is sensor structure schematic diagram provided in an embodiment of the present invention；
Fig. 2 is the part explosive view of sensor provided in an embodiment of the present invention；
Fig. 3 is waveform sensor schematic diagram provided in an embodiment of the present invention；
Fig. 4 is the circuit diagram of assembly circuit board in sensor provided in an embodiment of the present invention；
Fig. 5 is the appearance schematic diagram of sensor provided in an embodiment of the present invention.
Icon：1- shells；2- magnet plastic shells；3- magnet；4- assembly circuit boards；5- plastic lids；6- rubber seal；
7- harness seal plugs；8- harness；9- magnet assemblies.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
It is currently used for measure the speed of rotating object and the magnetic Hall sensor in direction usually have it is following several
Realization method：
Hall sensor uses two Hall switch chips, and chip angled arrangement on circuit boards.Work as gear
Or when magnetic encoder rotation, gear rotational speed is measured by the number of pulses counted in certain time, and according to two paths of signals
The phase relation of output carries out angle detecting.Two paths of signals output is defined as A, B, a-signal phase difference when main story
90 degree more advanced than B signal, 90 degree of the advanced a-signal of B signal, rotation direction is detected so as to this when inverted；
Hall sensor uses an integrated form Hall speed band direction chip, and chip interior actually still has two at this time
Or three spaced apart Hall units.When gear or magnetic encoder rotate, by counting the pulse in certain time
Quantity obtains gear rotational speed.About angle detecting, then judged by the different pulse width of positive and negative rotation, such as in the case of main story
45 μ s of pulsewidth, 90 μ s of pulsewidth under Reversion；
The shortcomings that above two technology, is that the system cost of sensor and magnetic coder is higher, lacks the flexibility of variation.Mesh
The scheme of preceding mainstream at least uses two Hall switch or an integrated form directional velocity chip.Hall chip is sensor master
Want cost source, occupy total material cost more than half.Therefore for the former, how by reducing number of chips come realisation
Valence is always the target designed than high speed and angle detecting；For the latter, chip is inherently more complicated, it is internal in addition to
Outside the Hall unit of 2-3 difference, also it is responsible for the special circuit etc. of processing signal, causes the Hall chip cost than the former
Two Hall switch it is taller.
Based on this, sensor provided in an embodiment of the present invention and detection device can be with small volume, lower-cost sensings
Device comes while measuring rotating object direction and speed.
It is described in detail below by embodiment.
Fig. 1 is sensor structure schematic diagram provided in an embodiment of the present invention.
Referring to Fig.1, sensor includes assembly circuit board 4, magnet assembly 9 and for fixation assembly circuit board 4 and magnetic group
The shell 1 of part 9；
Shell 1 is set on target object, so that target object drives magnet assembly 9 to be rotated；
Magnet assembly 9 is used to provide triggering magnetic field for assembly circuit board 4；
Assembly circuit board 4 is used to export square-wave signal according to triggering magnetic field, and square-wave signal is sent to controller, so that
Controller passes through square-wave signal, the direction of rotation of detected target object and speed.
Specifically, sensor assemblyization provided by the present application is compact to design, and is perforation installation, is easy to collect with tested application
At such as bearing, the target objects such as motor.It is detected different from shaft end, is not necessarily to exceptional space, sensor sleeve is located at target object
On, you can realize that cost is saved in the detection to target object rotating speed and direction of rotation, small volume, it is specific as shown in Figure 5；
Wherein, sensor is that plastic casing is used for (PCBA, Printed the Circuit Board+ of fixation assembly circuit board 4
Assembly), external mechanical external force is resisted, provides the confined space of encapsulating material to protect electronic component；
Further, as shown in Fig. 2, magnet assembly 9 includes multiple magnet 3 and the magnet modeling for fixing multiple magnet 3
Expect shell 2, wherein magnet plastic shell 2 is by 3 equidistant interval of magnet.Wherein, magnet plastic shell 2 is used to provide the outer of magnet 3
Portion protects, and by 3 equidistant apart of magnet, and the effect of magnet 3 is to generate magnetic switch chip work in triggering assembly circuit board 4
The magnetic field of work makes chip incude different magnetic field intensities, to flip chip working condition by exporting different magnetization curves
Variation；
Here, the principle of magnetic encoder is illustrated by the example of 8 magnet 3 and 12 magnet 3.8 magnet 3 and 12
The difference of magnet 3 is mainly reflected in the difference of the spacing distance between adjacent magnets 3, the spacing distance bigger of 8 magnet 3.Into one
Step, the different triggering magnetic fields that the magnetic switch chip on assembly circuit board 4 is generated according to magnet assembly 9 export different
Square-wave signal, wherein the magnet assembly 9 of 3 number of different magnet generates different characteristics, mechanical periodicity triggering magnetic field, target
The different rotary speed of object, direction generate different triggering magnetic field.
It (is driven by axis or other driving original papers) when magnet assembly 9 rotates, at this time the magnetic switch on assembly circuit board 4
Chip is influenced by 9 variation magnetic field of magnet assembly, makes the continuous square-wave signal of sensor output fixed duty cycle, sensor will
The square-wave signal of generation is transmitted to controller, and controller analyzes square-wave signal, and then obtains the rotation side of target object
To and speed；
Wherein, magnet 3 and the installation of sensor are also more compact in Machine Design, by buckle by magnet assembly 9 with
The inner ring of sensor housing 1 is fixed and limits axially, to only 9 circle rotation of magnet assembly be allowed to move, uses
This design so that sensor bulk smaller, sensor and 9 one-to-one mounting means of magnet assembly but also product yield more
Height reduces the possibility of product failure in use or failure.
Further, the triggering magnetic field that magnet assembly 9 is generated by reducing magnet number increases assembly circuit board 4 in mesh
When mark object rotates forward the duty ratio of square-wave signal exported and the duty ratio of the square-wave signal exported when target object inverts it
Between difference.
Specifically, if increasing the quantity of magnet 3, the duty ratio for rotating in the forward direction or reversely rotating will be close to 50%, i.e.,
The duty ratio mean allocation rotated and reverse；But if reducing 3 quantity of magnet, forward or reverse sensor output duty cycle will
Far from 50%.For example, if 3 quantity of magnet reaches 12, duty ratio rotates forward about 46%, reversion about 54%.If at this time will
3 quantity of magnet is reduced to 10, and it is about 42% to rotate forward duty ratio, and reversion duty ratio is about 58%.For the same part, rotate forward
It is 100% to invert the sum of duty ratio；
Wherein, the difference between the duty ratio by increasing positive and negative rotation square-wave signal so that controller is to square-wave signal
Recognition capability is more prominent, and then more accurate to the identification of target object direction of rotation；
Further, magnet assembly 9 is to be detachably connected with shell 1, can be by the magnet assembly 9 and shell of different magnet numbers
Body 1 carries out dismounting assembling.
Here, according to different actual conditions, it may be necessary to matching includes the magnet assembly 9 of different magnet numbers, this
When, if replacing, different sensor costs is higher, and the embodiment of the present invention can be by magnetic group of the different magnet quantity of meet demand
Part 9 carries out assembly and disassembly, and then the sensor met the requirements with shell 1, saves cost；
In addition, the embodiment of the present invention provides simplified magnetic Circuit Design, cancels injection molding magnet encoder, use what is be easily installed
Small magnet is assembled into magnet assembly 9, and realizes that the flexible of different duty adjusts by controlling adjacent magnets position；
Further, as shown in figure 4, assembly circuit board 4 includes magnetic switch chip, capacitance C, resistance R1, light-emitting diodes
Pipe LED and load resistance R2；
The input terminal of magnetic switch chip is connected with one end of power supply VCC and capacitance C respectively, another termination of capacitance C
The output end on ground, magnetic switch chip is connected with one end of resistance R1 and load resistance R2 respectively；The other end of resistance R1 with
The anode of Light-emitting diode LED is connected, the cathode ground connection of Light-emitting diode LED, and the other end ground connection of load resistance R2 is magnetic
The ground terminal of switch chip is connected with the cathode of Light-emitting diode LED.
Here, component passes through SMT (Surface Mount Technology, surface mount skill on assembly circuit board 4
Art) equipment patch is welded on circuit board, and then circuit board assembly is welded with harness 8.Circuit input is 5V direct currents, defeated
Go out for square-wave signal, high level is：3.4-4.2V output low level is 0-0.5V；
Wherein, by the parameter value of the components such as resistance in adjusting circuit, it can be achieved that the adjustment of output voltage values, above-mentioned defeated
It is only a kind of example to go out level value, it is not limited to this；
PCBA circuit board assemblies are used to provide the installation carrier of electronic component and provide circuit, further include EMC (electromagnetism
Compatibility) safeguard function；
The application use contactless magnetic induction principle, only use low cost, by a magnetic switch chip (Hall,
The switch chips such as AMR, GMR, TMR) output duty cycle it is different, to judge the positive and negative rotation of shaft；
Here, the preferred Hall chip of magnetic switch chip；
The application by software emulation obtain the optimum layout chip and magnetic field switching point analysis as a result, using simplified electricity
It designs on road, it is only necessary to which a chips are not necessarily to complex calculation circuit or processor；
Further, Light-emitting diode LED is used to show the working condition of sensor.
Wherein, on circuit boards, and each magnet 3 turns over can trigger Light-emitting diode LED sudden strain of a muscle for Light-emitting diode LED welding
It is bright, to help to judge whether sensor is in normal operating conditions；
Here, Light-emitting diode LED, magnetic switch chip are welded on assembly circuit board 4, are not shown in Fig. 2；
Sensor provided by the embodiments of the present application further includes that plastic lid 5 moulds sensor for sealing and protecting sensor
Material shell body opening seals, to protect the electronic devices such as assembly circuit board 4；
Further, further include the harness 8 being connected with assembly circuit board 4, for providing electric energy for assembly circuit board 4,
And square-wave signal is sent to controller.
Here, harness 8 (include connector) is for providing voltage needed for working sensor and by sensor output signal
Pass to controller；
Further, further include seal assembly for dustproof and waterproof, be separately positioned on harness 8 and 1 link position of shell
With shell 1 and target object link position.
Seal assembly include be arranged in the rubber seal 6 of shell 1 and target object link position, setting in harness 8 and
The harness seal plug 7 of 1 link position of shell；
Further, the embodiment of the present invention also provides detection device, including sensor as described above, further includes and senses
The controller that device is connected for the square-wave signal that receiving sensor is sent, and analyzes square-wave signal, knows target pair
The direction of rotation of elephant and speed.Further, controller knows the rotation side of target object according to the duty ratio of square-wave signal
The speed of target object is known to and by predetermined level number of the square-wave signal in preset time.
The embodiment of the present invention realizes the judgement of direction of rotation by widening the duty ratio mode of positive and negative rotation；
Specifically, the rotary speed of target object is calculated by the frequency of square wave for controller；Pass through the duty of square wave
Than be less than 50% be also above 50% come judge target object be rotate forward or reversion.It is envisioned that if magnet quantity too
It is more, no matter rotate forward or invert, duty ratio is all 50%, can not just judge it is positive or reversed, so must be by subtracting
Few magnet quantity, to widen duty ratio numerical value that is positive, reversely rotating, controller could identify rotating forward or reversion；
Here, controller can preset high level in the set time by detection or low level number knows target object
Speed；
The embodiment of the present invention provides inexpensive hall switched sensor, be equipped with can quantity increase and decrease magnetic coder, to
Realize that the adjustable low-cost system solution of duty ratio, sensor are only used only a double-electrode latch-type Hall and switch, pass through
It is rotated forward with the magnet assembly encoder of particular design and the purpose for detecting rotation direction by different duty is realized in reversion, therefore
The invention is related to the matching of two components of sensor and magnet pulley.
If as shown in figure 3, in Fig. 3 a a curves magnetic field intensity B axle positive characterizing part be magnetic encoder rotate forward
The characteristics of situation, double-electrode latch-type Hall switchs, exactly reaches certain triggering field value when positive magnetic field (such as the poles N), can touch
Hall switch is sent out to low level state (i.e. square wave mn sections), which is always maintained at, as magnetic encoder rotates, directly
Reversed (such as the poles S) same magnetic field trigger value is reached to magnetic field, a curves are in the negative-going portion of magnetization M axis, square wave electricity at this time
Level state overturning is high level.It is reciprocal with this until next N pole fields trigger again.
In addition, the changes of magnetic field between adjacent magnets replaces at sine and cosine curve cycle.When magnet quantity is few, adjacent magnets
Farther out, therefore field curve adjacent is more gentle for spacing, such as a curves in Fig. 3 a；When magnet quantity is more, adjacent magnets spacing compared with
Closely, therefore field curve adjacent is steeper, such as b curves in Fig. 3 b.The data difference for being embodied in duty ratio is exactly thighThe hundred of/T
Divide than different.
Using this point, the duty ratio numerical value of rotating forward can be controlled by adjusting different magnet quantity, i.e. magnet is more
When, duty ratio theoretical value is 50%.But if reducing magnet quantity, it can accomplish that increasing or reducing duty ratio (draws
The difference of big positive and negative rotation duty ratio), for example reach 30% or 70% (different depending on magnet south poles arranged direction).
Under normal circumstances, if magnet is close in circumference, duty ratio should infinite approach 50%.But such as Fig. 3 institutes
Show, chip is bipolar latch-type, so the magnetic field of flip chip work must be adjacent next antipolar phase with numerical value
Magnetic field.8 magnet are few with respect to the quantity of 10 magnet, so for few to magnet quantity, time for being undergone from n points to p points
It is longer than (the i.e. left figure t more than magnet quantityhighIt is longer than right figure thigh), therefore the duty ratio of Fig. 3 a is greater than Fig. 3 b, that is,
Why duty ratio can be adjusted by magnet quantity；
It when magnetic switch chip front side is placed, and will be set as rotating forward clockwise, at this point, duty ratio is less than anti-when rotating forward
Duty ratio (wherein concrete condition still needs to depending on chip patch is in circuit board front or reverse side) when turning, and the duty of positive and negative rotation
Than complementation, the duty ratio adduction of positive and negative rotation is 100%, wherein rotating forward duty ratio is 35%-45%, and reversion duty ratio is
65%-55%；
Using the difference of forward and reverse duty ratio, the detection and judgement for motor direction of rotation may be implemented.Control
Device can set the duty ratio of the square wave of acquisition as 30%, and for forward direction, opposite 70% duty ratio is then to reversely rotate.The application saves
The cost of at least one Hall chip and interlock circuit, signal wire is gone, while also simplifying the difficulty of controller design.
The embodiment of the present invention is a kind of magnet assembly encoder of inexpensive hall switched sensor combination low cost, can
Applied to booster bicycle pedal coaxial motor power-assisted, while having both speed and direction of rotation detection, high certainty of measurement, response
Time is fast, and simple for process, long lifespan, can be operated in high temperature, and in the environment of greasy dirt, circuit design is simple, is not related to decoding core
Piece, realization method is ingenious, at low cost to which Innovation Input is few.
Detection device provided in an embodiment of the present invention, the sensor technology having the same provided with above-described embodiment are special
Sign, so can also solve identical technical problem, reaches identical technique effect.
In the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " connects " connected "
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connects, and can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two members
Connection inside part.For the ordinary skill in the art, it can understand above-mentioned term in the present invention with concrete condition
Concrete meaning.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply relative importance.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.The apparatus embodiments described above are merely exemplary, for example, the division of the unit,
Only a kind of division of logic function, formula that in actual implementation, there may be another division manner, in another example, multiple units or component can
To combine or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be by some communication interfaces, device or unit it is indirect
Coupling or communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.
Finally it should be noted that：Embodiment described above, only specific implementation mode of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of sensor, which is characterized in that including assembly circuit board, magnet assembly and for fix the assembly circuit board and
The shell of magnet assembly；
The shell is set on target object, so that the target object drives the magnet assembly to be rotated；
The magnet assembly is used to provide triggering magnetic field for the assembly circuit board；
The assembly circuit board is used to export square-wave signal according to the triggering magnetic field, and the square-wave signal is sent to control
Device, so that the controller detects direction of rotation and the speed of the target object by the square-wave signal.
2. sensor according to claim 1, which is characterized in that the magnet assembly includes multiple magnet and for fixing
The magnet plastic shell of multiple magnet, wherein the magnet plastic shell is by the magnet equidistant interval.
3. sensor according to claim 1, which is characterized in that the assembly circuit board is generated according to the magnet assembly
The different triggering magnetic fields, export the different square-wave signals, wherein the magnet assemblies of different magnet numbers is given birth to
At the different triggering magnetic field, the different rotary speed of the target object, direction generate the different triggering magnetic field.
4. sensor according to claim 1 or 3, which is characterized in that the magnet assembly is given birth to by reducing magnet number
At the triggering magnetic field, increase accounting for for the square-wave signal that the assembly circuit board is exported when the target object rotates forward
Sky is than the difference between the duty ratio of the square-wave signal exported when the target object inverts.
5. sensor according to claim 1, which is characterized in that the assembly circuit board includes magnetic switch chip, electricity
Hold C, resistance R1, Light-emitting diode LED and load resistance R2；
The input terminal of the magnetic switch chip is connected with one end of power supply VCC and the capacitance C respectively, the capacitance C's
The other end is grounded, and the output end of the magnetic switch chip is connected with one end of the resistance R1 and the load resistance R2 respectively
It connects；The other end of the resistance R1 is connected with the anode of the Light-emitting diode LED, the cathode of the Light-emitting diode LED
Ground connection, the other end ground connection of the load resistance R2, ground terminal and the Light-emitting diode LED of the magnetic switch chip
Cathode is connected.
6. sensor according to claim 3, which is characterized in that the magnet assembly is detachably to connect with the shell
It connects, can the magnet assembly of different magnet numbers and the shell be subjected to dismounting assembling.
7. sensor according to claim 1, which is characterized in that further include harness and seal assembly；
The harness is connected with the assembly circuit board, for providing electric energy for the assembly circuit board, and by the square wave
Signal is sent to the controller；
The seal assembly is separately positioned on the harness and the shell link position and the shell and the target object
Link position is used for dustproof and waterproof.
8. sensor according to claim 7, which is characterized in that by buckling the magnet assembly and the shell
Inner ring is fixed and limits axially.
9. a kind of detection device, which is characterized in that including the sensor described in any one of claim 1-8, further include and institute
The controller that sensor is connected is stated, the square-wave signal sent for receiving the sensor, and the square-wave signal is carried out
Analysis, knows direction of rotation and the speed of target object.
10. detection device according to claim 9, which is characterized in that the controller is accounted for according to the square-wave signal
It is empty than knowing the direction of rotation of the target object and the predetermined level number by the square-wave signal in preset time
To know the speed of the target object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810417142.6A CN108414785A (en) | 2018-05-03 | 2018-05-03 | Sensor and detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810417142.6A CN108414785A (en) | 2018-05-03 | 2018-05-03 | Sensor and detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108414785A true CN108414785A (en) | 2018-08-17 |
Family
ID=63137536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810417142.6A Pending CN108414785A (en) | 2018-05-03 | 2018-05-03 | Sensor and detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108414785A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275045A (en) * | 2019-06-12 | 2019-09-24 | 杭州智缤科技有限公司 | A kind of devices and methods therefor detecting rotating cycle and direction |
| CN111273053A (en) * | 2020-01-22 | 2020-06-12 | 武汉船用机械有限责任公司 | Rotating speed measuring device for motor |
| CN112067995A (en) * | 2020-09-11 | 2020-12-11 | 广东美的暖通设备有限公司 | Detection device and detection method of magnetic suspension motor and magnetic suspension motor |
| CN113405562A (en) * | 2021-06-18 | 2021-09-17 | 广东工业大学 | Mileage measurement system and method based on magnetic sensor |
| CN113659879A (en) * | 2021-07-26 | 2021-11-16 | 极限人工智能有限公司 | Motor closed-loop control device and method for surgical robot |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010009367A1 (en) * | 1999-02-26 | 2001-07-26 | Dieter Seitzer | Sensor device to record speed and motion direction of an object, especially rotational speed and direction of a rotating object |
| KR20040056216A (en) * | 2002-12-23 | 2004-06-30 | 재단법인 포항산업과학연구원 | Revolution sensor using the magnetic shape distortion material and piezoelectric material |
| DE10331580A1 (en) * | 2003-07-11 | 2005-01-27 | Robert Bosch Gmbh | Device for detecting the rotational speed and / or the position of a rotating component |
| US20060164076A1 (en) * | 2002-06-27 | 2006-07-27 | Michael Hinz | Magnetoresistive sensor |
| CN2861971Y (en) * | 2005-09-19 | 2007-01-24 | 谢新茂 | Magnetic induction detecting structure for rotating device |
| JP2008267868A (en) * | 2007-04-17 | 2008-11-06 | Ntn Corp | Rotation detector, and bearing with rotation detector |
| US20090315544A1 (en) * | 2007-02-23 | 2009-12-24 | Ntn Corporation | Rotation detection device and rotation detector equipped bearing assembly |
| CN201673165U (en) * | 2010-06-01 | 2010-12-15 | 成都天兴仪表(集团)有限公司 | Speed sensor of motorcycle |
| CN202692930U (en) * | 2011-07-21 | 2013-01-23 | 霍尼韦尔传感控制(中国)有限公司 | Non-contact rotational position sensor system |
| CN202837318U (en) * | 2012-08-17 | 2013-03-27 | 重庆长安伟世通发动机控制系统有限公司 | Engine rotating speed measuring device based on magnetic encoder |
| US20130238278A1 (en) * | 2012-03-06 | 2013-09-12 | Allegro Microsystems, Inc. | Magnetic Field Sensor for Sensing Rotation of an Object |
| CN203490246U (en) * | 2013-08-07 | 2014-03-19 | 上海天沐传感器有限公司 | Speed sensor having speed-measuring and direction-finding function for brush motor of vehicle transmission |
| US20160123771A1 (en) * | 2014-10-31 | 2016-05-05 | Allegro Microsystems, Llc | Magnetic Field Sensor Providing a Movement Detector |
| CN105785063A (en) * | 2016-04-05 | 2016-07-20 | 中国船舶重工集团公司第七〇二研究所 | Rotation speed measuring device for mining and measuring method thereof |
| RU2598690C1 (en) * | 2015-12-04 | 2016-09-27 | Марина Владимировна Медведева | Method for measuring displacements of object |
| CN206557240U (en) * | 2017-01-24 | 2017-10-13 | 西安天问智能科技有限公司 | Velocity-measuring system and rotor craft |
| CN208420964U (en) * | 2018-05-03 | 2019-01-22 | 苏州微测电子有限公司 | Sensor and detection device |
-
2018
- 2018-05-03 CN CN201810417142.6A patent/CN108414785A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010009367A1 (en) * | 1999-02-26 | 2001-07-26 | Dieter Seitzer | Sensor device to record speed and motion direction of an object, especially rotational speed and direction of a rotating object |
| US20060164076A1 (en) * | 2002-06-27 | 2006-07-27 | Michael Hinz | Magnetoresistive sensor |
| KR20040056216A (en) * | 2002-12-23 | 2004-06-30 | 재단법인 포항산업과학연구원 | Revolution sensor using the magnetic shape distortion material and piezoelectric material |
| DE10331580A1 (en) * | 2003-07-11 | 2005-01-27 | Robert Bosch Gmbh | Device for detecting the rotational speed and / or the position of a rotating component |
| CN2861971Y (en) * | 2005-09-19 | 2007-01-24 | 谢新茂 | Magnetic induction detecting structure for rotating device |
| US20090315544A1 (en) * | 2007-02-23 | 2009-12-24 | Ntn Corporation | Rotation detection device and rotation detector equipped bearing assembly |
| JP2008267868A (en) * | 2007-04-17 | 2008-11-06 | Ntn Corp | Rotation detector, and bearing with rotation detector |
| CN201673165U (en) * | 2010-06-01 | 2010-12-15 | 成都天兴仪表(集团)有限公司 | Speed sensor of motorcycle |
| CN202692930U (en) * | 2011-07-21 | 2013-01-23 | 霍尼韦尔传感控制(中国)有限公司 | Non-contact rotational position sensor system |
| US20130238278A1 (en) * | 2012-03-06 | 2013-09-12 | Allegro Microsystems, Inc. | Magnetic Field Sensor for Sensing Rotation of an Object |
| CN202837318U (en) * | 2012-08-17 | 2013-03-27 | 重庆长安伟世通发动机控制系统有限公司 | Engine rotating speed measuring device based on magnetic encoder |
| CN203490246U (en) * | 2013-08-07 | 2014-03-19 | 上海天沐传感器有限公司 | Speed sensor having speed-measuring and direction-finding function for brush motor of vehicle transmission |
| US20160123771A1 (en) * | 2014-10-31 | 2016-05-05 | Allegro Microsystems, Llc | Magnetic Field Sensor Providing a Movement Detector |
| RU2598690C1 (en) * | 2015-12-04 | 2016-09-27 | Марина Владимировна Медведева | Method for measuring displacements of object |
| CN105785063A (en) * | 2016-04-05 | 2016-07-20 | 中国船舶重工集团公司第七〇二研究所 | Rotation speed measuring device for mining and measuring method thereof |
| CN206557240U (en) * | 2017-01-24 | 2017-10-13 | 西安天问智能科技有限公司 | Velocity-measuring system and rotor craft |
| CN208420964U (en) * | 2018-05-03 | 2019-01-22 | 苏州微测电子有限公司 | Sensor and detection device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275045A (en) * | 2019-06-12 | 2019-09-24 | 杭州智缤科技有限公司 | A kind of devices and methods therefor detecting rotating cycle and direction |
| CN111273053A (en) * | 2020-01-22 | 2020-06-12 | 武汉船用机械有限责任公司 | Rotating speed measuring device for motor |
| CN111273053B (en) * | 2020-01-22 | 2022-11-01 | 武汉船用机械有限责任公司 | Rotating speed measuring device for motor |
| CN112067995A (en) * | 2020-09-11 | 2020-12-11 | 广东美的暖通设备有限公司 | Detection device and detection method of magnetic suspension motor and magnetic suspension motor |
| CN113405562A (en) * | 2021-06-18 | 2021-09-17 | 广东工业大学 | Mileage measurement system and method based on magnetic sensor |
| CN113659879A (en) * | 2021-07-26 | 2021-11-16 | 极限人工智能有限公司 | Motor closed-loop control device and method for surgical robot |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108414785A (en) | Sensor and detection device | |
| CN102165285B (en) | Multiturn rotary encoder | |
| EP3351906B1 (en) | Door position detection device for electric door opener | |
| CN205484398U (en) | Sensing device , sensing system and a steering system | |
| CN104659973B (en) | Apparatus for detecting rotating speed and position of aircraft permanent magnet synchronous motor | |
| CN101750102A (en) | Magnetoelectric rotating encoder and magnetoelectric angle-rotating measuring method | |
| CN103764484A (en) | Combined steering torque-steering angle sensor | |
| CN208420964U (en) | Sensor and detection device | |
| CN107005183A (en) | A kind of steering wheel | |
| CN108844557A (en) | Encoder orthogonal sinusoidal wave producer production method | |
| CN105387879A (en) | Absolute position magnetic encoder of large center hole axial magnetization structure | |
| CN110004607A (en) | A method of it is looked for for industrial sewing machine booting and stops needle position | |
| CN206140531U (en) | Steering engine | |
| CN104613990A (en) | Double-rotation transformer decoding system and method | |
| CN203432593U (en) | Dual-output magnetoelectric encoder | |
| CN203488699U (en) | Non-contact electron shifter | |
| CN206638240U (en) | A kind of doubleway output motor encoder | |
| CN206506462U (en) | Driving stepper motor control system | |
| CN105603624B (en) | Weaving device and its degree mesh control system | |
| CN111284560B (en) | Steering position rotation sensor fitting | |
| CN204203258U (en) | Novel automobile speed pickup | |
| CN202453366U (en) | Speed measurement transducer based on light reflection principle | |
| CN204832235U (en) | Tachometer based on AMR magnetic resistance switcher chip | |
| CN108481365A (en) | For the absolute zero position detection device and detection method of robot, robot | |
| CN203157731U (en) | Electronic accelerator pedal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |